22001221110061 has 2 divisors, whose sum is σ = 22001221110062. Its totient is φ = 22001221110060.

The previous prime is 22001221110059. The next prime is 22001221110101. The reversal of 22001221110061 is 16001112210022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18404486102025 + 3596735008036 = 4290045^2 + 1896506^2 .

It is a cyclic number.

It is not a de Polignac number, because 22001221110061 - 2¹ = 22001221110059 is a prime.

Together with 22001221110059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22001221210061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11000610555030 + 11000610555031.

It is an arithmetic number, because the mean of its divisors is an integer number (11000610555031).

Almost surely, 2^{22001221110061} is an apocalyptic number.

It is an amenable number.

22001221110061 is a deficient number, since it is larger than the sum of its proper divisors (1).

22001221110061 is an equidigital number, since it uses as much as digits as its factorization.

22001221110061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 22001221110061 its reverse (16001112210022), we get a palindrome (38002333320083).

The spelling of 22001221110061 in words is "twenty-two trillion, one billion, two hundred twenty-one million, one hundred ten thousand, sixty-one".